diff --git a/testdata/arxiv-publicdomain/files100.txt b/testdata/arxiv-publicdomain/files100.txt
new file mode 100644
index 0000000..87c56e0
--- /dev/null
+++ b/testdata/arxiv-publicdomain/files100.txt
@@ -0,0 +1,100 @@
+1012/1012.5086.txt.gz
+1012/1012.0007.txt.gz
+1012/1012.2939.txt.gz
+1012/1012.4092.txt.gz
+1012/1012.5636.txt.gz
+1012/1012.4726.txt.gz
+1012/1012.3708.txt.gz
+1012/1012.4503.txt.gz
+1012/1012.3160.txt.gz
+1012/1012.3678.txt.gz
+1012/1012.4779.txt.gz
+1012/1012.2313.txt.gz
+1012/1012.5293.txt.gz
+1012/1012.3490.txt.gz
+1012/1012.2172.txt.gz
+1012/1012.5022.txt.gz
+1012/1012.1097.txt.gz
+1012/1012.1893.txt.gz
+1010/1010.1100.txt.gz
+1010/1010.0975.txt.gz
+1010/1010.0106.txt.gz
+1010/1010.0646.txt.gz
+1010/1010.0115.txt.gz
+1010/1010.4149.txt.gz
+1010/1010.3174.txt.gz
+1010/1010.0430.txt.gz
+1010/1010.1560.txt.gz
+1010/1010.2174.txt.gz
+1010/1010.2440.txt.gz
+1010/1010.5585.txt.gz
+1010/1010.4152.txt.gz
+1010/1010.5395.txt.gz
+1010/1010.5991.txt.gz
+1010/1010.0172.txt.gz
+1010/1010.1555.txt.gz
+1010/1010.1099.txt.gz
+1010/1010.4196.txt.gz
+1010/1010.4195.txt.gz
+1010/1010.1553.txt.gz
+1010/1010.3289.txt.gz
+1010/1010.0337.txt.gz
+1010/1010.1242.txt.gz
+1010/1010.3983.txt.gz
+1010/1010.4892.txt.gz
+0408/astro-ph0408168.txt.gz
+1308/1308.5044.txt.gz
+1308/1308.6579.txt.gz
+1308/1308.4538.txt.gz
+1308/1308.1870.txt.gz
+1308/1308.1494.txt.gz
+1308/1308.0503.txt.gz
+1308/1308.5730.txt.gz
+1308/1308.1055.txt.gz
+1308/1308.5087.txt.gz
+1308/1308.6048.txt.gz
+1308/1308.1996.txt.gz
+1308/1308.6107.txt.gz
+1308/1308.4366.txt.gz
+1308/1308.5042.txt.gz
+1308/1308.3474.txt.gz
+1308/1308.6044.txt.gz
+1308/1308.3320.txt.gz
+1308/1308.5045.txt.gz
+1308/1308.1438.txt.gz
+1308/1308.6637.txt.gz
+1308/1308.1092.txt.gz
+1308/1308.2185.txt.gz
+1309/1309.2975.txt.gz
+1309/1309.1155.txt.gz
+1309/1309.3525.txt.gz
+1309/1309.1894.txt.gz
+1309/1309.0999.txt.gz
+1309/1309.1509.txt.gz
+1309/1309.2963.txt.gz
+1309/1309.6168.txt.gz
+1309/1309.6033.txt.gz
+1309/1309.6281.txt.gz
+1309/1309.2617.txt.gz
+1309/1309.5064.txt.gz
+1309/1309.7938.txt.gz
+1309/1309.3744.txt.gz
+1309/1309.1009.txt.gz
+1309/1309.5415.txt.gz
+1309/1309.3542.txt.gz
+1309/1309.1000.txt.gz
+1309/1309.1156.txt.gz
+1309/1309.7505.txt.gz
+1309/1309.2904.txt.gz
+1309/1309.2368.txt.gz
+1309/1309.7439.txt.gz
+1309/1309.7742.txt.gz
+1309/1309.2651.txt.gz
+1309/1309.7961.txt.gz
+1309/1309.7473.txt.gz
+1309/1309.3294.txt.gz
+1309/1309.4307.txt.gz
+1309/1309.5468.txt.gz
+1309/1309.6450.txt.gz
+1309/1309.2311.txt.gz
+1309/1309.3065.txt.gz